PML logo

We are open and shipping orders.

Phone: 310-671-4345 M–F 8am to 4:30pm Pacific



Infomacion en EspaƱol

AAM 14 Bolt, Rear Differential Cover
2019 and Newer Trucks

PML Part Number 11176

Availability: We have a few covers available. Call PML at 310-671-4345 to order or sign up for our mailing list.

Volume: about 0.25 to 0.5 quarts over stock

Description: 2019 and newer trucks have a new version of the American Axle Manufacturing (AAM) 14 bolt differential. The shape and bolt hole pattern are very similar to the pre–2019 covers. The ring gear may be 12 inches, instead of 11.5 or 11.8.

Pictures of PML part number 11176, AAM 14 Bolt for 2019 and newer trucks:

2019 and newer 14 bolt PML differential cover 2019+ 14 bolt PML cover   New PML AAM 12 inch differential cover, black powder coated PML rear end cover in black powder coat   Gasket on PML cover Gasket on PML cover
As Cast Finish, Black Powder Coat finish, Inside of Cover with Stock Gasket
Click on image to view larger.

This new PML cover is an updated version of PML part number 11147.


  • Drain and magnetic drain plug included
  • Heavy duty, sand cast aluminum
  • Finned for heat dissipation
  • Works with brake line bracket, no modification needed
  • Clears sway and pan hard bars on trucks with coil leaf suspension
  • Extra capacity


We have seen this new differential on:

  • 2019 Ram 2500 and 3500
  • 2020 Ram 2500 and 3500
  • 2020 GM 2500 and 3500

For pre–2019 trucks with the AAM 11.5, 11.8 differential, see PML Part Numbers 10361 (Ram 3500), 11147 (Ram 2500) or 9511 (GM trucks).

Comparing AAM Stock Covers and Gaskets

Pictures of the 2019 stock cover (first picture) and pre–2019 stock differential covers.

2019 Ram 2500 and 3500 stock rear differential cover   2003 to 2018 Ram 3500 stock rear differential cover   2014 to 2018 Ram 2500 stock rear differential cover
First picture: 2019 and newer Ram 2500 and Ram 3500 stock cover and 2020 and newer GM HD truck stock cover
Second picture: 2003 to 2018 Ram 3500 stock cover (also some 2003 to 2013 Ram 2500)
Third picture: 2014 to 2018 Ram 2500 stock cover

Gasket for this new differential is GM part number 68454491AA.

New AAM gasket compared to pre 2019 gasket
Click on image to view larger in a new tab or window.

The covers and gaskets for 2019 and newer and pre–2019 are similar but NOT interchangeable.

Mailing List Sign Up

Let us know if you are interested in a cover for this new differential.

* indicates required

We welcome information and suggestions are welcome. Email info and pictures of the stock cover to: or call us 310-671-4345

PML differential cover hardware

PML Differential Cover Package

PML ships this differential cover with a fill plug, level check plug, magnetic drain plug and new mounting bolts.

Click on image to view larger in a new tab or window.

Pre–2019 Gasket and New 2019 Cover

These pictures show a gasket from a pre-2019 AAM 14 bolt cover on a 2019 Ram 2500 truck. The top and bottom bolt holes lined up but none of the other holes.


Installation of Preliminary Cover

This part was successfully installed on a 2019 Ram 2500 Diesel Truck with coil suspension and a Hellwig sway bar.

Our thanks to Dave for working with us. Pictures from his installation are below:

2019 Ram 2500 stock differential cover 2019 Ram 2500 stock differential cover   Draining 2019 Ram 2500 differential Draining fluid from 2019 Ram 2500 differential   PML differential cover installed on 2019 Ram 2500 PML differential cover installed
Click on image to view larger in a new tab or window.